Indus Valley Civilization is also known as Harappan culture:

A Harappa was the first site to be excavated in the Indus Valley

B The site of Harappa is six times larger than Mohenjodaro site

C The Indus Valley Civilization is considered the elementary / initial stage of vedic culture and Harappa is believed to be the same as Harappa mantioned the Vedas

D The most important evidence of the achievements of this civilization have been excavated from Harappa